Dust-collector



(No Model.)

- J. A. & E. F.:WOODBU'RY.

DUST COLLECTOR.

No. 424,157. Patented Mar. 25, 1890'.

WITNEIS 5 ES;

N, PETERS. Phowlilhngraphur, Washingwn, D. C.

To all whom, it may concern;

f -UNITED STAT-E's PATENT OFFICE.

JAMES a. woonBUnY, on wmonns'rnn, AND EDWARDF. WOODBURY, or

no'sroiv, MASSACHUSETTS.

DUST-COLLECTOR.

- SPECIFICATION forming part of Letters Patent No. 424,157, dated March 25, 1890.

7 Application filed May 5, 1888; Serial No. 272.969. (No model.)

Be it known that we, JAMES A. WVOODBURY, of \Vinchester, county of Middlesex, and State of Massachusetts, and EDWARD F. lVooD- BURY, of Boston, in the county'of Suffolk and State of Massachusetts, have jointly invented certain new and useful Improvements in Dust- Collectors, of which the following, taken in connection with the accompanying drawings, is a specification.

Our invention relates to improvements in dust-collectors designed for the separating of dust and shavings from the air by centrifugal force, a blower being used to give the dustladen air the required velocity. I p

The object of our invention is to produce a dust-collector from which the purified air and the dust may be discharged without reversing the direction of travel of either the air or the dust in their passage through the collector,

which insures a very perfect separation of the dust and shavings from the purified air and with the minimum power required. We attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 represents collector in elevation, and Fig.2 is a plan of Fig. 1. Fig. 3 is a vertical sectional view of the collector on section line 10 10 of Fig. 2, looking toward the dust-laden-air inlet. Fig. erepresents in elevation outlet cylinder with its connected parts and illustrates means of reducing the area of the annular dust-outlet, and Fig. 5 is a plan of Fig. 4. with the addition of the body of the collector being represented in crosssection.

The parts composing the collector are made usually of plate-iron riveted and soldered together.

Nomenclature of parts composing the collector: collector-body 11, collector-head 12, dustladen-air inlet 13, outlet-cylinder 14, frustum 15, inverted frustuln 16, air-outlet pipe 17, and outlet-cylinder-supporting strips 18.

The collector-body 11, cylindrical in form, is closed at its top by means of the head 12, and is provided with the dust-laden-air inlet 13, tangentially connected therewith. The outlet-cylinder 14 is fastened in its position convenient.

within the lower end of the collector-body by means of the bent strips 18. The outside diameter of the outlet-cylinder is such compared with the inside diameter of the collector-body as to leave the annular dust-outlet 19. This annular dust-outlet is open throughout its discharge-end, forming an annular dischargeorifice, which permits the free escape of the dust. To the'upper part of the outlet-cylinder is secured the hollow frustum 15, to which is secured the inverted hollow frustum. 16, and to which is suspended the air-outlet pipe 17 within the outlet-cylinder.

For some conditions of use it maybe desirable to contract the area of the annular dustoutlet. This may be accomplished by the placing of the area-reducing strips 20 and 21, as represented by Figs. 4 and 5, as follows: To reduce the area of the annular dust-outlet 19 one-half, four vertical strips 20 are placed quartering within the annular dust-outlet 19, and to the top of each of the strips 20 may be fastened one of the strips 21, which extends to the bottom of the collector to point halfway between the vertical strips. For some conditions of use the inverted hollow frustum 16 and the strips 20 and 21 may be dispensed with. The purified-air-outlet pipe 17 should be extended to such a place as may be most These proportions and sizes shouldbe and may be varied to comply with or to suit the diiferent conditions required when separating different kinds of dust-laden all.

The operation of the collectoris as follows: The dust-laden air is forced into the collector by means of a blower in the usual common way through blower dischargepipe (not shown) and through dust-laden-air inlet into the colo lector. The velocity of the blast is such that all dust having a greater specific gravity than the air by reason of centrifugal force obtained by the forced rotary motion of the dustladen air due to its tangential entrance into of the dust being downward spirally, the dust is finally forced into the annular dust'outlet, where it loses its imparted weight and falls therefrom without being reversed out of the collector by means of the force of gravitation, while the air which has been purified from the dust is forced out of the collector without be ing reversed through the air outlet pipe, which is centrally located as regards the whirling column of air in the same direction as the dust.

The collector is designed to accomplish the perfect separation of dust-laden air, and possesses the following claimed advantages: The kinetic energy or weight imparted to the dust is retained until the dust is out of disturbin influencive causes, and the dust, without bein g reversed, falls from the collector by gravitation, while the purified air is forced out of the collector, without being reversed, in the same direction as the dust and with the expenditure of a minimum amount of power. The ellicct of these claimed advantages is to obtain a maximum separating el'ficiency with a minimum expenditure of power.

The supportil'lgstrips, as 18, are claimed in our application for Letters Patent for contrifugal shavings and dust-collectors, filed March 26, 1888, Serial No. 268,565.

\Vhat we do claim as new, and desire to secure by, Letters Patent, is

1. A dust-collector comprising an imperforate cylindrical body provided with a tight head at one end, and a tangential inlet for the dustdaden air, an air-outlet cylinder shorter and smaller than said body disposed therein near the opposite end thereof, one end of said cylinder opening into said body, and an aninder 1i, placed within the lower end of the collector-body and provided with the purifiedair-outlet pipe 17, within the outlet-cylinder, substantially as and for the purpose set forth.

4:. A collector for separating dust from air, provided with a cylindrical body, a closed head, a dust-laden-air inlet, and an annular dust-outlet having an annular discharge-orifice from which the dust falls without being reversed during its passage through the collector, and a purified-air outlet, through which the air is forced without being reversed during its passage through the collector, the whole in combination and for operation sub stantially as and for the purpose set forth.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, on this 2d day of May, A. l). 1888.

JAMES A. \VOODBURY. EDWARD I \VOODBURY. Witnesses: Gnonon PATTEN, .1. L. BAILEY. 

